GB934871A - Improvements in or relating to circuits for effecting differential amplification of different frequencies - Google Patents

Improvements in or relating to circuits for effecting differential amplification of different frequencies

Info

Publication number
GB934871A
GB934871A GB3908058A GB3908058A GB934871A GB 934871 A GB934871 A GB 934871A GB 3908058 A GB3908058 A GB 3908058A GB 3908058 A GB3908058 A GB 3908058A GB 934871 A GB934871 A GB 934871A
Authority
GB
United Kingdom
Prior art keywords
line
delay
dec
delay line
output
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3908058A
Inventor
Ivanhoe John Penfound James
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB3908058A priority Critical patent/GB934871A/en
Publication of GB934871A publication Critical patent/GB934871A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/20—Circuitry for controlling amplitude response
    • H04N5/205—Circuitry for controlling amplitude response for correcting amplitude versus frequency characteristic
    • H04N5/208—Circuitry for controlling amplitude response for correcting amplitude versus frequency characteristic for compensating for attenuation of high frequency components, e.g. crispening, aperture distortion correction

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)
  • Picture Signal Circuits (AREA)

Abstract

934,871. Correcting networks. ELECTRIC & MUSICAL INDUSTRIES Ltd. Dec. 3, 1959 [Dec. 4, 1958], No. 39080/58. Class 40 (8). [Also in Group XL (c)] A variable gain-frequency response circuit comprises a delay line, correctly terminated at one end and open at the other, connected to the output of an amplifier which supplies antiphase signals to the two ends of the line, and a variable resistive path bridging at least a portion of the delay line. The circuit may be used for correcting aperture distortion of a television signal. The signal to be corrected is applied to the input of a " long-tailed pair " 1, 2 between the anodes of which are connected a delay network comprising capacitors 6 and two mutually coupled inductors 7. The anode of valve 2 is connected to the junction of two resistors 8, 9 which together are equal to the characteristic impedance of the line, and the output is taken via a capacitor 14. In order to adjust the amount of correction, a variable resistor 11 in series with a fixed resistor 12 is connected between the ends of the line. The delay network may be replaced by a distributed type delay line. Specification 789,934 is referred to.
GB3908058A 1958-12-04 1958-12-04 Improvements in or relating to circuits for effecting differential amplification of different frequencies Expired GB934871A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3908058A GB934871A (en) 1958-12-04 1958-12-04 Improvements in or relating to circuits for effecting differential amplification of different frequencies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3908058A GB934871A (en) 1958-12-04 1958-12-04 Improvements in or relating to circuits for effecting differential amplification of different frequencies

Publications (1)

Publication Number Publication Date
GB934871A true GB934871A (en) 1963-08-21

Family

ID=10407516

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3908058A Expired GB934871A (en) 1958-12-04 1958-12-04 Improvements in or relating to circuits for effecting differential amplification of different frequencies

Country Status (1)

Country Link
GB (1) GB934871A (en)

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